Drilling machine and the like



Oct. 16, 1934. G. HEY

DRILLING MACHINE AND THE LIKE 3 Sheets-Sheet l Filed Sept. 15, 1930 I l I l l l I l l I i l Get. 16, 1934. J HEY DRILLING MACHINE AND THE LIKE Filed Sept. 15. 1930 '5 Sheets-Sheet 2 k 1 m w W T nmw u llllm w/ Oct. 16, 1934. J. G. HEY 1,977,061

DRILLING MACHINE AND THE LIKE Filed Sept. 15, 1930 L 5 Sheets-Sheet 3 Patented Oct. 16, 1934 UNITED STATES DRILLING MACHINE AND THE LIKE John G. Hey, Cincinnati, Ohio, assignor to The Avey Drilling Machine Company, Cincinnati, Ohio, a corporation of Ohio Application September 15, 1930, Serial No. 481,885

8 Claims.

The present invention relates to drilling and like machines, and seeks to provide improved means for driving the drill spindle at different speeds. Usually, in high speed drills, the spindle is driven by a belt from -a countershaft on the drill frame, the belt engaging a stepped pulley on the countershaft to provide different speeds of the drill spindle, and the countershaft is operated from a power shaft of a motor mounted in its own frame.

In accordance with the present invention, the drill spindle is movable through and keyed to rotate with a sleeve journaled in the offset head of the drill frame and the stator and rotor of an electric motor are mounted in the head, with the motor shaft preferably disposed closely adjacent and parallel to the sleeve and directly connected by gearing thereto. Provision is made for changing the connecting gearing, and the motor mounted in the head is preferably of the multi-phase, variable speed, alternating current type, so that the drill spindle can be operated at a large numberof dilferent speeds.

These and other objects and features of the invention are hereinafter more fully set forth, are illustrated in the preferred forms in the accompanying drawings and the invention more particularly pointed out in the appended claims.

In the drawings:

Fig. 1 is an elevation of the improved drilling machine, with the head and driving mechanism for the drill spindle shown in section.

Fig. 2 is a horizontal section on the line 22 of Fig. 1..

Fig. 3 is a detail plan view of the head with its cover plate removed and parts of the drive gearing shown in section.

Fig. 4 is a vertical section illustrating a modification of the drive gearing.

Fig. 5 is a side View with parts shown in section illustrating a further modification.

Fig. 6 is an end view of the construction.

shown in Fig. 5.

In the form shown in Fig. 1, the drill frame comprises the usual upright, hollow pedestal or standard 10, and an integral offset head 11. The latter is chambered and is preferably of the outline shown in Figs. 1 and 2. The drill spindle 12 extends through and is journaled in the usual spindle sleeve 13 and the latter extends through a guiding head 13' which is adjustably clamped in position :upon the forward face of the standard 10. The usual feed shaft 14 is journaled in the guiding head 13' and is provided with a pinion 15 engaging a rack 16 on the sleeve 13.

Also, the head is provided with a gear casing 17 and a worm wheel 18 disposed within the casing and mounted on the feed shaft is engaged by a worm 19 mounted on a vertical shaft 20 extends within the head and provides means 90 for effecting the power feed of the drill spindle. The feed shaft is also provided with the usual hand lever 21, and a counterweight 22 is ,connected to the spindle sleeve by a chain 23 that extends over guide pulleys 24.

The drill spindle 12 extends upwardly into the head 11 of the frame and through a driving sleeve 25. The spindle is longitudinally movable through the sleeve and is keyed'to rotate therewith. The sleeve 25 and a motor shaft 26 are disposed within the chambered head 11 and are j ournaled in the upper and lower plates or castings 2'7 and 28 of the head, which are connected by pins 29 and machine screws 30 to the main body of the head. Preferably, as shown, ball-bearings 21 for the sleeve and shaft are provided, the bearing for the sleeve being held in place by annular plugs 32 threaded into openings in the end plates. The, upper bearing for the motor shaft is seated in a socket in the upper plate 27 and the lower bearing is held in place by a screw plug 33.

The rotor 34 and the stator 35 for the motor are disposed within the chambered head, the former being mounted on and keyed to the large central portion of the shaft 26 and the latter being suitably secured in position to the walls of the chambered head. The upper .ends of the motor shaft and the driving sleeve 25 for the spindleare directly connected by gearing and, preferably, the motor is of the multi-phase, variable speed, alternating current type, so that by means of a controlling switch, a number of different speeds are provided for the drill spindle. In the form shown, conductors lead from the coils of the stator into a suitable switch box 36 and the switch therein can be manipulated in any suitable way, as, for example, by means of a shaft 37 having a knob on its outer end. Also, in the form shown, fans 38 are mounted upon the somewhat reduced end portions of the shaft outside of the stator and are arranged to draw air through openings 39 formed in the side walls of the chambered head and force the same outwardly through outlet openings 40in the end plates.

The speed of the spindle can also be changed by providing variable speed gearing between the adjacent ends of the sleeve 25 and the motor shaft 26. In the form shown in Figs. 1 and 3,

intermeshing gears 41 and 42 are keyed to and removably held in position on the upper ends of the sleeve and motor shaft. Preferably, as shown, the upper end plate 27 is enlarged and provided with a flange 43 to form a gear casing. A removable cap plate 44 extends over the gears and is removably held in place by machine screws 45 extending into the flange 43. By removing the cap plate, gears of different sizes can be applied to the shaft and sleeve to vary the speed of the drill spindle, as desired.

To operate the power feed for the drill spindle, the sleeve 25 extends somewhat below the head and a stepped pulley 45 is keyed thereto. This pulley is adapted to be connected by a belt to a companion stepped pulley 46 mounted upon a stud shaft 4'7, and gears 48 connect the stepped pulley 46 and the shaft 20 of the power feed. The pulley 46 and the gears 48' are carried by a casting 49 which forms a casing for the gears and is supported by a bracket 50 on the upper portion of the frame standard.

For quiet operation, the motor shaft and the sleeve for driving the spindle are connected by herring-bone gears, such as indicated in Fig. 1, or, if desired, sprockets and a silent chain can be employed. Also, grooved pulleys 51 and 52 connected by V-shaped belts 53 (see Fig. 4) can be satisfactorily employed. But while access is readily afforded to the connecting gears by removing the cap plate 44, the motorshaft and sleeve shaft are so closely adjacent that gearing of these types cannot be readily disconnected to change them and thereby vary the speed. For this purpose, the member of the gearing, such as the gear 41 or the pulley 51, is not directly keyed to the motor shaft. Instead, an axially movable collar 54 is splined to the reduced upper end of the shaft; and the hub, either of the gear 41 or pulley 51, is splined to this collar. Preferably as shown, the collar is provided with a plurality of integral ribs 55 (see Fig. 3) which engage groovesformed in the reduced end of the motor shaft and in the hub of the gear or pulley mounted thereon. Preferably also, the collar is provided with a flange 56 at its upper end for convenience in disengaging it. By first removing the collar, the

gear member engaged thereby may be shifted laterally on the shaft 26 out of engagement with the gear-with which it was meshed, and thereby freeing the gear so that it can be readily removed and replaced.

In the form shown, the collar 54 and the pulley or gear keyed thereto are held in place by a washer 57 and a nut 58 threaded on the upper reduced end of the shaft. The gear 42 or pulley 52 'on the upper end of the sleeve 25 is removably held in place by a nut 59.

The improved drill mechanism can be employed in any desired position, for example, either vertical as indicated in Fig. 1, or horizontal, as shown in Fig. 5. The construction of the parts in the form shown in Figs. 5 and 6 is entirely similar to that already described, except that the outer end of the casting is enlarged to form a gear box 61, in which gearing is provided for varying the speed of the drill spindle without necessitating the removal and interchange of connecting gears. In the form shown, gears 62 of three different sizes, with the smaller gear in intermediate position, are keyed to the sleeve 25 which drives the spindle 10, as previously described. This sleeve is extended asshown and is journaled at its outer end in a suitable ball-bearing carried by a cap plate 63 for the gear box. The motor shaft 26' is also extended and journaled at its outer end in a bearing carried by the cap 63 and a group of three pinions 64 is keyed to the extension of the motor shaft and is adapted to slide axially thereon to connect the motor shaft, through the medium of any one of the gears 62, to the sleeve 25 and spindle 10. A shifting yoke 65 engages the group of gears or pinions 64, has a sliding engagement with the extension of the shaft 26' and is mounted to slide upona fixed stud 66. A short rack 67 fixed to the sliding yoke is engaged by a pinion 68 on the lower end of a vertical shaft 69. The latter is provided at its upper end with a handle 70 by which the shift of the gearing can be readily effected.

Changes may be made in the details set forth without departure from the scope of the invention as defined in the claims.

I claim as my invention:

1. In a drilling machine, a machine frame having a chambered head, an electric motor and a rotatable sleeve shaft mounted inside of said head with the latter forming the motor frame and with the motor shaft parallel to and opposite said sleeve shaft, said shafts being journalied in the ends. of the head and projecting externally through the outer end of the head a drill spindle movable through and keyed to said sleeve shaft and projecting through the inner end of the head, changeable speed gearing at the outer end of said frame directly connecting the outer projecting ends of said sleeve and motor shafts, a feed shaft for the drill spindle driven from the inner end of said sleeve shaft, and an adjustable guiding head for the drill spindle wherein the said feed shaft is mounted substantially as described.

2. In a drilling machine, a frame having a head at one end, a motor and rotatable sleeve shaft mounted in said head with the motor shaft parallel to and adjacent said sleeve shaft, a drill spindle movable through and keyed to said sleeve shaft, removable gearing connecting the outer projecting ends of said sleeve and motor shafts,

and a collar arranged within and splined to the hub of one of said gears and to the shaft whereon such gear is mounted, said collar being axially removable from the shaft independently of the gear splined to the collar said gear being laterally movable upon its shaft to disengage the gearing when the collar has been removed substantially as described;

3. In a drilling machine, a frame having a head at one end, a motor and rotatable sleeve shaft mounted in said head with the motor and sleeve shafts arranged side by side, a drill spindle movable through and keyed to said sleeve shaft, a collar splined on the outer projecting end of the motor shaft, and changeable connecting gears mounted on and keyed to said collar and the outer end of said sleeve shaft respectively, said collar being removable from the mo-' tor shaft independently of the gear splined to the collar, said gear being laterally movable upon its shaft to disengage the gearing when the collar has been removed substantially as described.

4. In a drilling or like machine, a driving electric motor, a frame for the machine having an integral hollow head forming the motor frame, the motor shaft and a sleeve shaft being disposed side by side in said head and journaled in the ends of said head with the outer ends of the motor shaft and sleeve shaft projecting externally through the outer end of said head, removable gears mounted on the outer projecting ends of said sleeve shaft and motor shaft outside the adjacent end of said head, and a drill spindle keyed to and movable through said sleeve shaft and projecting from one end thereof, substantially as described.

5. In a drilling machine, the combination of an electric motor, a frame for the machine having an integral offset, chambered head forming the motor frame or casing having removable cap plates at its outer and inner ends, the motor shaft and a sleeve shaft disposed side by side Within said casing and journaled in said cap plates with the outer ends of said shafts projecting through the outer cap plate, a drill spindle keyed to and movable through said sleeve and projecting from the inner end thereof, and removable gears mounted on the projecting ends of said sleeve shaft and motor shaft outside of the outer cap plate of said head, said outer cap plate having a flange and removable cover constituting an enclosing casing for said gearing, substantially as described.

6. In a drilling machine, a machine frame having a chambered head, an electric motor and a rotatable sleeve shaft mounted within said chambered head, the latter forming the motor frame and the motor shaft and sleeve shaft being disposed side by side within the head and journaled in the ends thereof, an adjustable guiding head on said frame, a spindle sleeve guided therein, an endwise movable drill spindle journaled in said spindle sleeve and extending therefrom into one end of and slidably keyed to said sleeve shaft, the outer end of the sleeve shaft and the outer end of the motor shaft projecting externally beyond the outer end of said chambered head, and connecting gearing removably mounted on the outer projecting ends of said shafts externally of the chambered head, substantially as described.

7. In a drilling machine, a frame having an offset, chambered head at one end, a motor armature and field winding mounted within said head, the motor shaft and a sleeve shaft being disposed side by side within the head and journaled in the ends thereofwith the outer shaft ends projecting beyond the outer end of the head and the inner end of the sleeve shaft projecting beyond the inner end of the head, connecting gearing removably mounted on the outer projecting ends of said shafts externally of the head, a drill spindle keyed within and extending from the inner end of the sleeve shaft, a feed shaft for the drill spindle driven from the inner end of said sleeve shaft, and an adjustable guiding head for the spindle wherein said feed shaft is mounted substantially as described.

8. In a drilling machine, the combination of the machine frame comprising an upright standard having an integral, chambered head forming a motor casing, a multi-speed electric motor armature and field winding mounted in said head with the armature shaft vertically disposed, a vertical sleeve shaft arranged beside the motor, said motor and sleeve shafts being journaled in upper and lower bearings and projecting above the upper bearings, gearing directly connecting and removably mounted on upper projected ends of said shafts, a guiding head adjustably mounted on said standard and a drill spindle mounted therein and having its upper end movable through and keyed to the said sleeve shaft, substantially as described.

JOHN G. HEY. 

